// gulpfile.js
//gulp的入口文件
//导入文件路径API
const { dest, src, series, parallel, watch } = require('gulp');
const loadPlugins = require('gulp-load-plugins');

const browserSync = require('browser-sync');

const plugin = new loadPlugins();
const bs = browserSync.create();


const data = {
    menus: [
        {
            name: 'Home',
            icon: 'aperture',
            link: 'index.html'
        },
        {
            name: 'Features',
            link: 'features.html'
        },
        {
            name: 'About',
            link: 'about.html'
        },
        {
            name: 'Contact',
            link: '#',
            children: [
                {
                    name: 'Twitter',
                    link: 'https://twitter.com/w_zce'
                },
                {
                    name: 'About',
                    link: 'https://weibo.com/zceme'
                },
                {
                    name: 'divider'
                },
                {
                    name: 'About',
                    link: 'https://github.com/zce'
                }
            ]
        }
    ],
    pkg: require('./package.json'),
    date: new Date()
}


const clean = () => {
    return del(['dist', 'temp']);
}

const style = () => {
    /**
     * 但是并没有与src一样的路径。所以需要指定 {base：'src'}
     */
    return src('src/assets/styles/*.scss', { base: 'src' }).pipe(plugin.sass())
        .pipe(dest('dist'));
}

const script = () => {
    return src('src/assets/scripts/*.js', { base: 'src' })
        .pipe(
            plugin.babel({
                presets: ['@babel/preset-env']
            })
        )
        .pipe(dest('dist'))
}

const page = () => {
    return src("src/*.html", { base: 'src' }).pipe(plugin.swig({data})).pipe(dest('dist'));
}

const image = () => {
    return src("src/assets/images/**", { base: 'src' }).pipe(plugin.imagemin()).pipe(dest('dist'));
}

const fonts = () => {
    return src("src/assets/fonts/**", { base: 'src' }).pipe(plugin.imagemin()).pipe(dest('dist'));
}

const extra = () => {
    return src("public/**", { base: 'public' }).pipe(dest('dist'));
}

const serve = () => {
    watch("src/assets/styles/*.scss", style);
    watch("src/assets/scripts/*.js", script);
    watch("src/*.html", page);
    // watch("src/assets/images/**", image)
    // watch("src/assets/fonts/**", fonts)
    // watch("public/**", extra)
    watch([
        'src/assets/images/**',
        'src/assets/scripts/*.js',
        'src/*.html'
    ], bs.reload);

    bs.init({
        server: {
        port: 8080,
        // baseDir: 'dist',
        baseDir: ["dist","public","src"],
        files: 'dist/**',
        // open: false,
        routes: {
            '/node_modules': "node_modules"
        }
        }
    });
}
const compile = parallel(page, script);

//上线之前执行的任务
const build = parallel(compile, fonts, image, extra);

const develop = series(compile, serve);

module.exports = {
    clean,
    compile, build, develop
}
